mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
48ea98d1d2
The allocas going out of scope are immediately killed by the return instruction. This is a resend of r208912, which was committed accidentally. Reviewers: chandlerc Differential Revision: http://reviews.llvm.org/D3792 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208920 91177308-0d34-0410-b5e6-96231b3b80d8
183 lines
5.4 KiB
LLVM
183 lines
5.4 KiB
LLVM
; RUN: opt < %s -inline -S | FileCheck %s
|
|
|
|
; We have to apply the less restrictive TailCallKind of the call site being
|
|
; inlined and any call sites cloned into the caller.
|
|
|
|
; No tail marker after inlining, since test_capture_c captures an alloca.
|
|
; CHECK: define void @test_capture_a(
|
|
; CHECK-NOT: tail
|
|
; CHECK: call void @test_capture_c(
|
|
|
|
declare void @test_capture_c(i32*)
|
|
define internal void @test_capture_b(i32* %P) {
|
|
tail call void @test_capture_c(i32* %P)
|
|
ret void
|
|
}
|
|
define void @test_capture_a() {
|
|
%A = alloca i32 ; captured by test_capture_b
|
|
call void @test_capture_b(i32* %A)
|
|
ret void
|
|
}
|
|
|
|
; No musttail marker after inlining, since the prototypes don't match.
|
|
; CHECK: define void @test_proto_mismatch_a(
|
|
; CHECK-NOT: musttail
|
|
; CHECK: call void @test_proto_mismatch_c(
|
|
|
|
declare void @test_proto_mismatch_c(i32*)
|
|
define internal void @test_proto_mismatch_b(i32* %p) {
|
|
musttail call void @test_proto_mismatch_c(i32* %p)
|
|
ret void
|
|
}
|
|
define void @test_proto_mismatch_a() {
|
|
call void @test_proto_mismatch_b(i32* null)
|
|
ret void
|
|
}
|
|
|
|
; After inlining through a musttail call site, we need to keep musttail markers
|
|
; to prevent unbounded stack growth.
|
|
; CHECK: define void @test_musttail_basic_a(
|
|
; CHECK: musttail call void @test_musttail_basic_c(
|
|
|
|
declare void @test_musttail_basic_c(i32* %p)
|
|
define internal void @test_musttail_basic_b(i32* %p) {
|
|
musttail call void @test_musttail_basic_c(i32* %p)
|
|
ret void
|
|
}
|
|
define void @test_musttail_basic_a(i32* %p) {
|
|
musttail call void @test_musttail_basic_b(i32* %p)
|
|
ret void
|
|
}
|
|
|
|
; Don't insert lifetime end markers here, the lifetime is trivially over due
|
|
; the return.
|
|
; CHECK: define void @test_byval_a(
|
|
; CHECK: musttail call void @test_byval_c(
|
|
; CHECK-NEXT: ret void
|
|
|
|
declare void @test_byval_c(i32* byval %p)
|
|
define internal void @test_byval_b(i32* byval %p) {
|
|
musttail call void @test_byval_c(i32* byval %p)
|
|
ret void
|
|
}
|
|
define void @test_byval_a(i32* byval %p) {
|
|
musttail call void @test_byval_b(i32* byval %p)
|
|
ret void
|
|
}
|
|
|
|
; Don't insert a stack restore, we're about to return.
|
|
; CHECK: define void @test_dynalloca_a(
|
|
; CHECK: call i8* @llvm.stacksave(
|
|
; CHECK: alloca i8, i32 %n
|
|
; CHECK: musttail call void @test_dynalloca_c(
|
|
; CHECK-NEXT: ret void
|
|
|
|
declare void @escape(i8* %buf)
|
|
declare void @test_dynalloca_c(i32* byval %p, i32 %n)
|
|
define internal void @test_dynalloca_b(i32* byval %p, i32 %n) alwaysinline {
|
|
%buf = alloca i8, i32 %n ; dynamic alloca
|
|
call void @escape(i8* %buf) ; escape it
|
|
musttail call void @test_dynalloca_c(i32* byval %p, i32 %n)
|
|
ret void
|
|
}
|
|
define void @test_dynalloca_a(i32* byval %p, i32 %n) {
|
|
musttail call void @test_dynalloca_b(i32* byval %p, i32 %n)
|
|
ret void
|
|
}
|
|
|
|
; We can't merge the returns.
|
|
; CHECK: define void @test_multiret_a(
|
|
; CHECK: musttail call void @test_multiret_c(
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: musttail call void @test_multiret_d(
|
|
; CHECK-NEXT: ret void
|
|
|
|
declare void @test_multiret_c(i1 zeroext %b)
|
|
declare void @test_multiret_d(i1 zeroext %b)
|
|
define internal void @test_multiret_b(i1 zeroext %b) {
|
|
br i1 %b, label %c, label %d
|
|
c:
|
|
musttail call void @test_multiret_c(i1 zeroext %b)
|
|
ret void
|
|
d:
|
|
musttail call void @test_multiret_d(i1 zeroext %b)
|
|
ret void
|
|
}
|
|
define void @test_multiret_a(i1 zeroext %b) {
|
|
musttail call void @test_multiret_b(i1 zeroext %b)
|
|
ret void
|
|
}
|
|
|
|
; We have to avoid bitcast chains.
|
|
; CHECK: define i32* @test_retptr_a(
|
|
; CHECK: musttail call i8* @test_retptr_c(
|
|
; CHECK-NEXT: bitcast i8* {{.*}} to i32*
|
|
; CHECK-NEXT: ret i32*
|
|
|
|
declare i8* @test_retptr_c()
|
|
define internal i16* @test_retptr_b() {
|
|
%rv = musttail call i8* @test_retptr_c()
|
|
%v = bitcast i8* %rv to i16*
|
|
ret i16* %v
|
|
}
|
|
define i32* @test_retptr_a() {
|
|
%rv = musttail call i16* @test_retptr_b()
|
|
%v = bitcast i16* %rv to i32*
|
|
ret i32* %v
|
|
}
|
|
|
|
; Combine the last two cases: multiple returns with pointer bitcasts.
|
|
; CHECK: define i32* @test_multiptrret_a(
|
|
; CHECK: musttail call i8* @test_multiptrret_c(
|
|
; CHECK-NEXT: bitcast i8* {{.*}} to i32*
|
|
; CHECK-NEXT: ret i32*
|
|
; CHECK: musttail call i8* @test_multiptrret_d(
|
|
; CHECK-NEXT: bitcast i8* {{.*}} to i32*
|
|
; CHECK-NEXT: ret i32*
|
|
|
|
declare i8* @test_multiptrret_c(i1 zeroext %b)
|
|
declare i8* @test_multiptrret_d(i1 zeroext %b)
|
|
define internal i16* @test_multiptrret_b(i1 zeroext %b) {
|
|
br i1 %b, label %c, label %d
|
|
c:
|
|
%c_rv = musttail call i8* @test_multiptrret_c(i1 zeroext %b)
|
|
%c_v = bitcast i8* %c_rv to i16*
|
|
ret i16* %c_v
|
|
d:
|
|
%d_rv = musttail call i8* @test_multiptrret_d(i1 zeroext %b)
|
|
%d_v = bitcast i8* %d_rv to i16*
|
|
ret i16* %d_v
|
|
}
|
|
define i32* @test_multiptrret_a(i1 zeroext %b) {
|
|
%rv = musttail call i16* @test_multiptrret_b(i1 zeroext %b)
|
|
%v = bitcast i16* %rv to i32*
|
|
ret i32* %v
|
|
}
|
|
|
|
; Inline a musttail call site which contains a normal return and a musttail call.
|
|
; CHECK: define i32 @test_mixedret_a(
|
|
; CHECK: br i1 %b
|
|
; CHECK: musttail call i32 @test_mixedret_c(
|
|
; CHECK-NEXT: ret i32
|
|
; CHECK: call i32 @test_mixedret_d(i1 zeroext %b)
|
|
; CHECK: add i32 1,
|
|
; CHECK-NOT: br
|
|
; CHECK: ret i32
|
|
|
|
declare i32 @test_mixedret_c(i1 zeroext %b)
|
|
declare i32 @test_mixedret_d(i1 zeroext %b)
|
|
define internal i32 @test_mixedret_b(i1 zeroext %b) {
|
|
br i1 %b, label %c, label %d
|
|
c:
|
|
%c_rv = musttail call i32 @test_mixedret_c(i1 zeroext %b)
|
|
ret i32 %c_rv
|
|
d:
|
|
%d_rv = call i32 @test_mixedret_d(i1 zeroext %b)
|
|
%d_rv1 = add i32 1, %d_rv
|
|
ret i32 %d_rv1
|
|
}
|
|
define i32 @test_mixedret_a(i1 zeroext %b) {
|
|
%rv = musttail call i32 @test_mixedret_b(i1 zeroext %b)
|
|
ret i32 %rv
|
|
}
|